Clear AxesY cause to export fail

[AlexeyRedko]

Hi,

I have a PDF report generator that contains many charts. That reason lead me to create only one chart and clear its properties before I export it to an image each time. What I got is a report with only one chart (the first one), so I sieve all my custom method and I found that AxesY.Clear() lead to 'Object reference not set to an instance of an object.' exception when I'm trying to export (any other chart properties clear method not damaging).

Sample code:

			[color= rgb(43, 145, 175);]Chart[/color] WPFChart = [color= blue;]new[/color] [color= rgb(43, 145, 175);]Chart[/color](); 			[color= green;]// First chart fill[/color]			[color= rgb(43, 145, 175);]SeriesAttributes[/color] SA = [color= blue;]new[/color] [color= rgb(43, 145, 175);]SeriesAttributes[/color]();			SA.ItemsSource = [color= blue;]new[/color] [color= rgb(43, 145, 175);]List[/color]<[color= blue;]double[/color]>() { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };			SA.Stroke = [color= rgb(43, 145, 175);]Brushes[/color].Red;			SA.StrokeThickness = 2d;			SA.Gallery = [color= rgb(43, 145, 175);]Gallery[/color].Line;			WPFChart.Series.Add(SA); 			[color= green;]// Clear chart [/color]			WPFChart.Series.Clear();			WPFChart.AxesY.Clear();	  		    [color= green;]// Second chart fill[/color]			SA = [color= blue;]new[/color] [color= rgb(43, 145, 175);]SeriesAttributes[/color]();			SA.ItemsSource = [color= blue;]new[/color] [color= rgb(43, 145, 175);]List[/color]<[color= blue;]double[/color]>() { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };			SA.Stroke = [color= rgb(43, 145, 175);]Brushes[/color].Red;			SA.StrokeThickness = 2d;			SA.Gallery = [color= rgb(43, 145, 175);]Gallery[/color].Line;			WPFChart.Series.Add(SA); 			[color= green;]// Export chart to file[/color]			[color= blue;]string[/color] FilePath = [color= rgb(163, 21, 21);]@"C:\Temp\TestWPFChart.png"[/color]; 			[color= blue;]if[/color] ([color= rgb(43, 145, 175);]File[/color].Exists(FilePath))				[color= rgb(43, 145, 175);]File[/color].Delete(FilePath); 			[color= blue;]using[/color] ([color= rgb(43, 145, 175);]FileStream[/color] FS = [color= blue;]new[/color] [color= rgb(43, 145, 175);]FileStream[/color](FilePath, [color= rgb(43, 145, 175);]FileMode[/color].CreateNew))			{				WPFChart.Export([color= rgb(43, 145, 175);]FileFormat[/color].Png, FS); // Export crush!!!		    }

I'm looking for some workaround or ideas.

Thanks,

Alexey